Classification and characteristics of brass
The brass material is called special brass if it is a multiple alloy composed of two or more elements. Such as copper alloys composed of lead, tin, manganese, nickel, iron, silicon. Brass has strong wear resistance. Special brass is also called special brass, which has high strength, high hardness and strong chemical resistance. There are also outstanding mechanical properties of cutting. The seamless copper tube drawn from brass is soft and wear-resistant. Brass seamless pipes can be used in heat exchangers and condensers, cryogenic pipelines, and submarine transport pipes. Manufacture of sheets, bars, rods, pipes, cast parts, etc. Contains copper at 62% to 68%, strong plasticity, and manufacturing pressure-resistant equipment.
Brass rods are classified into ordinary brass and special brass according to the types of alloy elements contained in brass. Pressed brass is called deformed brass.
Brass is an alloy of copper and zinc. The simplest brass is copper-zinc binary alloy, called simple brass or ordinary brass. Changing the zinc content in brass can obtain brass with different mechanical properties. The higher the zinc content in brass, the higher the strength and the lower the plasticity. The zinc content of brass used in the industry does not exceed 45%. No matter how high the zinc content is, it will cause brittleness and deteriorate the alloy performance. In order to improve the performance of brass, brass with other alloying elements is called special brass. Commonly used alloying elements are silicon, aluminum, tin, lead, manganese, iron and nickel. Adding aluminum to brass can increase the yield strength and corrosion resistance of brass, and slightly reduce plasticity. Brass containing less than 4% aluminum has good comprehensive properties such as processing and casting. Adding 1% tin to brass can significantly improve the resistance of brass to seawater and marine atmospheric corrosion, so it is called "Navy Brass". Tin also improves the machinability of brass. The main purpose of adding lead to brass is to improve machinability and wear resistance. Lead has little effect on the strength of brass. Manganese brass has good mechanical properties, thermal stability and corrosion resistance; adding aluminum to manganese brass can also improve its performance and obtain a smooth surface casting. Brass can be divided into two types of products: casting and pressure processing.